//===----------------------------------------------------------------------===//
//
// Copyright (C) 2022 Sophgo Technologies Inc.  All rights reserved.
//
// TPU-MLIR is licensed under the 2-Clause BSD License except for the
// third-party components.
//
//===----------------------------------------------------------------------===//

#pragma once
#ifndef FP16_BITCASTS_H
#define FP16_BITCASTS_H

#if defined(__cplusplus) && (__cplusplus >= 201103L)
#include <cstdint>
#elif !defined(__OPENCL_VERSION__)
#include <stdint.h>
#endif

#if defined(__INTEL_COMPILER)
#include <immintrin.h>
#endif

#if defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
#include <intrin.h>
#endif

static inline float fp32_from_bits(uint32_t w) {
#if defined(__OPENCL_VERSION__)
  return as_float(w);
#elif defined(__CUDA_ARCH__)
  return __uint_as_float((unsigned int)w);
#elif defined(__INTEL_COMPILER)
  return _castu32_f32(w);
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
  return _CopyFloatFromInt32((__int32)w);
#else
  union {
    uint32_t as_bits;
    float as_value;
  } fp32 = {w};
  return fp32.as_value;
#endif
}

static inline uint32_t fp32_to_bits(float f) {
#if defined(__OPENCL_VERSION__)
  return as_uint(f);
#elif defined(__CUDA_ARCH__)
  return (uint32_t)__float_as_uint(f);
#elif defined(__INTEL_COMPILER)
  return _castf32_u32(f);
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
  return (uint32_t)_CopyInt32FromFloat(f);
#else
  union {
    float as_value;
    uint32_t as_bits;
  } fp32 = {f};
  return fp32.as_bits;
#endif
}

static inline double fp64_from_bits(uint64_t w) {
#if defined(__OPENCL_VERSION__)
  return as_double(w);
#elif defined(__CUDA_ARCH__)
  return __longlong_as_double((long long)w);
#elif defined(__INTEL_COMPILER)
  return _castu64_f64(w);
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
  return _CopyDoubleFromInt64((__int64)w);
#else
  union {
    uint64_t as_bits;
    double as_value;
  } fp64 = {w};
  return fp64.as_value;
#endif
}

static inline uint64_t fp64_to_bits(double f) {
#if defined(__OPENCL_VERSION__)
  return as_ulong(f);
#elif defined(__CUDA_ARCH__)
  return (uint64_t)__double_as_longlong(f);
#elif defined(__INTEL_COMPILER)
  return _castf64_u64(f);
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
  return (uint64_t)_CopyInt64FromDouble(f);
#else
  union {
    double as_value;
    uint64_t as_bits;
  } fp64 = {f};
  return fp64.as_bits;
#endif
}

#endif /* FP16_BITCASTS_H */
